Maybe a Dendrobium?

[Orchideetje]

Hi all!

Just a few days ago I rescued two orchids from the dust-bin. My window cill is their new home, but I have no idea if that's actually a good place for them (there's a radiator under it). And I also don't know what kind they are. I have been browsing on the web and found some info about the Dendrobium orchid. It could be that my orchids are related to this family? At this moment they are not blossoming, but they get white flowers between the leaves. Should I also remove the old flowers? And the weird crumpled leaves on the left cane; is that normal? Further, should I water on the soil or should I sprinkle water on the leaves? In short, HELP!

Thank you in advance!!

Orchideetje